一、关于“电压”教材及其教学目标从简单的电现象的知识不足以建立电压概念,从力学和热学知识中直接引入并建立电压概念有一定的困难,教材从水压与电压、水流的功和电流的功的类比中想让学生认识电压的作用,由于概念不清,加上在关键的地方没有实验事实的支持,缺乏直观形象性.这些构成了“电压”教学成为教学难点的根本原因。“电压”一课的教学目标应从学生的知识水平和认识能力以及从他们的继续学习的必要性去确定。通过教学,不仅要让学生理解电压的作用,而且还要让学生 I. About “Voltage” Textbooks and Teaching Goals The knowledge of simple electrical phenomena is insufficient to establish the concept of voltage. It is difficult to directly introduce and establish the voltage concept from the knowledge of mechanics and thermal science. The teaching materials are from water pressure and voltage and current. In the analogy of work and current, students want to understand the role of voltage. Due to unclear concepts, there is no support for experimental facts in key areas, and they lack intuitive visuality. These constitute the fundamentals of teaching “voltage” teaching as a difficulty in teaching. the reason. The teaching objectives of the “Voltage” lesson should be determined from the students’ knowledge level and cognitive abilities and from the necessity of their continued learning. Through teaching, we must not only let students understand the role of voltage, but also let students